Former Secretary of Defense Robert Gates – A look back

U.S. Defense Secretary Robert Gates flies on a Blackhawk helicopter back to Camp Victory after meeting with Iraq's president and prime minister in Baghdad April 7, 2011. Months before the United States is due to complete its withdrawal from Iraq, Washington is stepping up pressure on Iraqi leaders to decide whether U.S. troops should stay to help fend off a still-potent insurgency. REUTERS/Chip Somodevilla/Pool